MR1040170 Papageorgiou, Nikolaos S. Nikolaos S. PAPAGEORGIOU Existence of optimal controls for nonlinear distributed parameter systems Funkcialaj Ekvacioj. Serio Internacia 32 1989 429--437 http://fe.math.kobe-u.ac.jp/FE/Free/vol32/fe32-3-8.pdf http://fe.math.kobe-u.ac.jp/FE/FE_pdf_with_bookmark/FE31-34-en_KML/fe32-429-437/fe32-429-437.pdf http://www.ams.org/mathscinet-getitem?mr=MR1040170 fe32-429-437 1989 Existence of Optimal Controls for Nonlinear Distributed Parameter Systems PAPAGEORGIOU, Nikolaos S. PAPAGEORGIOU, Nikolaos S.
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